Preliminary fix for

Issue 216: Cannot create GLCanvas on non-default GraphicsDevice

Made JOGL Xinerama-aware; now uses screen 0 rather than the screen
reported from the AWT GraphicsDevice when Xinerama is enabled. So far
only compiled and tested on non-Xinerama configuration on Linux; more
testing needed on Xinerama setups and on Solaris.


git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@782 232f8b59-042b-4e1e-8c03-345bb8c30851

1 files changed, 128 insertions, 0 deletions

diff --git a/src/native/jogl/XineramaHelper.c b/src/native/jogl/XineramaHelper.c
new file mode 100644
index 000000000..3991204d5
--- /dev/null
+++ b/src/native/jogl/XineramaHelper.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * - Redistribution of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * 
+ * - Redistribution in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * 
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ * 
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ * 
+ */
+
+/* This file contains a helper routine to be called by Java code to
+   determine whether the Xinerama extension is in use and therefore to
+   treat the multiple AWT screens as one large screen. */
+
+#include <inttypes.h>
+#include <X11/Xlib.h>
+
+#ifdef __sun
+
+typedef Status XineramaGetInfoFunc(Display* display, int screen_number,
+         XRectangle* framebuffer_rects, unsigned char* framebuffer_hints,
+         int* num_framebuffers);
+typedef Status XineramaGetCenterHintFunc(Display* display, int screen_number,
+                                         int* x, int* y);
+
+XineramaGetCenterHintFunc* XineramaSolarisCenterFunc = NULL;
+
+#elif defined(__linux__)
+
+#include "Xinerama.h"
+
+#endif
+
+Bool XineramaEnabled(Display* display) {
+#ifdef __sun
+
+  char* XinExtName = "XINERAMA";
+  int32_t major_opcode, first_event, first_error;
+  Bool gotXinExt = False;
+  void* libHandle = 0;
+  unsigned char fbhints[MAXFRAMEBUFFERS];
+  int locNumScr = 0;
+  Bool usingXinerama = False;
+
+  char* XineramaLibName= "libXext.so";
+  char* XineramaGetInfoName = "XineramaGetInfo";
+  char* XineramaGetCenterHintName = "XineramaGetCenterHint";
+  XineramaGetInfoFunc* XineramaSolarisFunc = NULL;
+
+  gotXinExt = XQueryExtension(awt_display, XinExtName, &major_opcode,
+                              &first_event, &first_error);
+
+  if (gotXinExt) {
+    /* load library, load and run XineramaGetInfo */
+    libHandle = dlopen(XineramaLibName, RTLD_LAZY | RTLD_GLOBAL);
+    if (libHandle != 0) {
+      XineramaSolarisFunc = (XineramaGetInfoFunc*)dlsym(libHandle, XineramaGetInfoName);
+      XineramaSolarisCenterFunc =
+        (XineramaGetCenterHintFunc*)dlsym(libHandle,
+                                          XineramaGetCenterHintName);
+      if (XineramaSolarisFunc != NULL) {
+        if ((*XineramaSolarisFunc)(awt_display, 0, &fbrects[0],
+                                   &fbhints[0], &locNumScr) != 0) {
+
+          usingXinerama = True;
+          /* set global number of screens */
+          awt_numScreens = locNumScr;
+        }
+      }
+      dlclose(libHandle);
+    }
+  }
+  return usingXinerama;
+  
+#elif defined(__linux__)
+
+  char* XinExtName = "XINERAMA";
+  int32_t major_opcode, first_event, first_error;
+  Bool gotXinExt = False;
+  int32_t locNumScr = 0;
+
+  XineramaScreenInfo *xinInfo;
+
+  gotXinExt = XQueryExtension(display, XinExtName, &major_opcode,
+                              &first_event, &first_error);
+
+  if (gotXinExt) {
+    printf("Have Xinerama extension\n");
+    xinInfo = XineramaQueryScreens(display, &locNumScr);
+    if (xinInfo != NULL) {
+      printf("Xinerama extension active\n");
+      return True;
+    }
+  }
+  printf("Xinerama extension not present or inactive\n");
+  return False;
+
+#else
+  return False;
+#endif
+}